Hi- Took on another project. This LF320EM4A has a black screen and a flashing red light. The board in it is a combination board of power&video which I have already replaced. After attempting to power it up the red light flashes 4 times and then goes back solid red again. I cannot see any image with a flash light on the black screen or any evidence of the LEDs coming up. I have read a lot on this and it has been suggested both the LED strips or the ir sensor are the problem and this is common on this model apparently. Before I go and waste money on the wrong thing again I thought I would ask here. If pictures of anything are needed, let me know